Romans 2:5

“But after thy hardness and impenitent heart, etc..] The apostle goes on to show, that such persons who promise themselves impunity on the score of prosperity, shall not always go unobserved and unpunished; for there is a day of wrath and righteous judgment hastening on, and will take place after they have filled up the measure of their iniquity. There is a natural “hardness” of the heart in every son and daughter of Adam; and there is an acquired habitual hardness, which is increased by sinning; and a judicial one, which God, for sin, sometimes gives persons up unto. An “impenitent heart” is not only an heart which does not repent, but such an one as cannot repent, being harder than the…”

“treasurest up unto thyself wrath against--rather "in." the day of wrath--that is wrath to come on thee in the day of wrath. What an awful idea is here expressed--that the sinner himself is amassing, like hoarded treasure, an ever accumulating stock of divine wrath, to burst upon him in "the day of the revelation of the righteous judgment of God!" And this is said not of the reckless, but of those who boasted of their purity of faith and life.”

“But after thy hardness - The word “after” here κατά kata means in respect to, or you act according to the direct tendency of a hard heart in treasuring up wrath. The word “hardness” is used to denote insensibility of mind. It properly means what is insensible to the touch, or on which no impression is made by contact, as a stone, etc. Hence, it is applied to the mind, to denote a state where no motives make an impression; which is insensible to all the appeals made to it; see Matthew 25:24; Matthew 19:8; Acts 19:9. And here it expresses a state of mind where the goodness and forbearance of God have no effect. The man still remains obdurate, to use a word which has precisely the meaning of…”

“Treasurest up wrath - Although thou thinkest thou art treasuring up all good things. O what a treasure may a man lay up either way, in this short day of life! To thyself - Not to him whom thou judgest. In the day of wrath, and revelation, and righteous judgment of God - Just opposite to "the goodness and forbearance and longsuffering" of God. When God shall be revealed, then shall also be "revealed" the secrets of men's hearts, Rom 2:16. Forbearance and revelation respect God, and are opposed to each other; longsuffering and righteous judgment respect the sinner; goodness and wrath are words of a more general import. Romans 2:6”

“But after: Rom 11:25 \*marg. Exo 8:15, Exo 14:17; Deu 2:30; Jos 11:20; Sa1 6:6; Ch2 30:8, Ch2 36:13; Psa 95:8; Pro 29:1; Isa 48:4; Eze 3:7; Dan 5:20; Zac 7:11, Zac 7:12; Heb 3:13, Heb 3:15, Heb 4:7 treasurest: Rom 9:22; Deu 32:34; Amo 3:10; Jam 5:3 the day: Job 21:30; Pro 11:4; Pe2 2:9, Pe2 3:7; Rev 6:17 revelation: Rom 2:2, Rom 2:3, Rom 1:18; Ecc 12:14 Romans 2:6”